05-14-2017
awk has automatic type conversion.
The ! operator is a boolean that is rather a number (being 1 or 0) than a string, so there is a decent hint to treat the variable as a number.
In border cases there can be differences between awk versions. E.g. the awk in AIX is a derivate from nawk, where awk in Linux is mostly gawk, but some Linux have mawk that is again little different.
The bottom line is, make the data type clear, e.g. typical casts are
var "" append a null string, result is a string
var+0 add a zero, result is a number
This User Gave Thanks to MadeInGermany For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi , Migrating AIX 4.3.3 ML10 to 5.3 ML1 (retaining 32 bit)
after successfully going through 5 of the 5.3 Install CD's. After "All fileset's processed successfully " message I was told that system would reboot and then I would get prompted for setting TERm type ( i have an ascii ibm3151) and... (1 Reply)
Discussion started by: Student37
1 Replies
2. Shell Programming and Scripting
Hi,
two teams at two locations - A & B. At location A, we have AIX 5.3 and at location B, we have AIX 5.1. We execute the below awk command in loc A and it executes successfully(part of a larger script). But the same does not get executed in the loc B server.
We are not able to access the loc B... (1 Reply)
Discussion started by: ranj@chn
1 Replies
3. AIX
Hello All,
We want to upgrade our 44p Model 270 from AIX 5.2 to 5.3. This is a standalone devlopment server but downtime is something we don't want because we have a short development deadline looming. I have no tape drive to make backups to. I myself am a developer and don't have any... (4 Replies)
Discussion started by: Fred Vogel
4 Replies
4. AIX
Hi,
redbook documentation is telling that IY17981 fix is required for aix 4.3.3 to aix 5L migration. But there is no mention about that fix in any ML installation packages.
- My system is ML11 :
oslevel –r
4330-11
- But xlC.rte is on wrong version :
lslpp -L xlC.rte
xlC.rte ... (3 Replies)
Discussion started by: astjen
3 Replies
5. Shell Programming and Scripting
Is there a way to treat a string as date and compare it to the current date?
lets assum inpu lik
$ cat myfile
Name Last login
**************************
Sara 2/13/2012
kalpeer 2/15/2012
ygemici 2/14/2012
we want to display the name who logged in during the last #... (4 Replies)
Discussion started by: Sara_84
4 Replies
6. Shell Programming and Scripting
Hi all,
For no particular reason, I would like to use awk on a file that contains multiple columns, but let's say only columns 1 and 2 have some text values, and the remainder of the line contains text that I would like to treat as one column, considering I have spaces as delimiter for the... (33 Replies)
Discussion started by: ppucci
33 Replies
7. Shell Programming and Scripting
I need to search the file using strings "Request Type" , " Request Method" , "Response Type" and by using result set find the xml tags and convert into a single line?. below are the scenarios.
Cat test
Nov 10, 2012 5:17:53 AM
INFO: Request Type
Line 1.... (5 Replies)
Discussion started by: laknar
5 Replies
8. AIX
I'm New to AIX / VIOS
We're doing a FC switch cutover on an ibm device, connected via SAN.
How do I tell if one path to my remote disk is lost? (aix lvm)
How do I tell when my link is down on my HBA port?
Appreciate your help, very much! (4 Replies)
Discussion started by: BG_JrAdmin
4 Replies
9. AIX
Hi Experts , I want to start migrating our AIX 6.1 to AIX 7.1 . I am planning to use alt_disk_migration . Chris gibson has awesome documentation in the internet. However I am running into an issue with EMC odm filesets . So my current OS is AIX 6.1. and I have this :
lslpp -l | grep EMC
... (7 Replies)
Discussion started by: JME2015
7 Replies
10. Shell Programming and Scripting
Hi, awk seem to be acting differently in Unix and Linux when it comes to formatting. This is making it difficult to migrate scripts.
for example:
UNIX:
echo "123" |awk '{printf ("%05s\n" ,$1)}'
00123
echo "123" |awk '{printf ("%05d\n" ,$1)}'
00123
echo "S12" |awk '{printf ("%05s\n"... (9 Replies)
Discussion started by: wanderingmind16
9 Replies
LEARN ABOUT MOJAVE
ucblinks
ucblinks(1B) SunOS/BSD Compatibility Package Commands ucblinks(1B)
NAME
ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices
SYNOPSIS
/usr/ucb/ucblinks [-e rulebase] [-r rootdir]
DESCRIPTION
ucblinks creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.
ucblinks does not remove unneeded compatibility links; these must be removed by hand.
ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been created,
since the reconfiguration may have resulted in more compatibility names being needed.
In releases prior to SunOS 5.4, ucblinks used a nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses nawk
for the default operation, although nawk rule-bases can still be specifed with the -e option. The nawk rule-base equivalent to the SunOS
5.4 default operation can be found in /usr/ucblib/ucblinks.awk.
OPTIONS
-e rulebase Specify rulebase as the file containing nawk(1) pattern-action statements.
-r rootdir Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.
FILES
/usr/ucblib/ucblinks.awk sample rule-base for compatibility links
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO
devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)
SunOS 5.10 13 Apr 1994 ucblinks(1B)